Although I've felt envious at times of all the talking you've been doing, I also wonder if that meant that you got attached and had expectations of him. You've got that line about expectations in your signature and it sounds like his plans to come down set up an expectation in you. Which I think would happen to all of us if we weren't watching ourselves carefully.
If you still want to give it a shot, then the good news is that I don't see where he said anything discouraging to you. He couldn't talk to you the first time because he wasn't alone, and then texting is never a good way to talk about anything serious because it's so easy to read tone into it.
So, if you still want to leave the door open, I might consider sending a short follow up text that says something like "I'm sorry. I got emotional because I was looking forward to seeing you and now it sounds like that will be delayed. I shouldn't have taken it out on you because I know that's not your fault - it's work and they need you." and then leave it in his court.
And if he wanted to resume the talking, I'd really try to cut it down on my end and be less available for him. If you're busy GAL, then you shouldn't always be available when he wants to talk! I think that cutting down the frequency and being intermittently available, while also being positive when he talks to you would be a great thing. I would also try my hardest not to pursue him, in words or actions, to get him coming in your direction again.
This limbo is really tough. On one hand, it's like nothing's changed and you're talking frequently, so it's so easy to fall back into feeling like he's there for you and you're his priority. But you're not right now, and that's a painful thing to accept.
So take time - no rush - and figure out what you want to do at this juncture. Do you want to keep trying? Not keep trying but leave the door cracked open for him? Or not keep trying and close that door? Those are all your options. You're in control.
